AutoCodes – Scion – P043E Scion

P043E Scion Code - Evaporative Emission System Leak Detection Reference Orifice Low Flow

Quick Answer

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. Common causes include Faulty Canister Pump Module, Canister Pump Module harness is open or shorted, Canister Pump Module circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P043E Scion indicates Evaporative Emission System Leak Detection Reference Orifice Low Flow.
Common causes: Common causes include Faulty Canister Pump Module, Canister Pump Module harness is open or shorted, Canister Pump Module circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 16,728

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 26, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P043E Scion Description

5 hours after the ignition switch is turned off, the leak detection pump creates negative pressure (vacuum) in the Evaporative Emission (EVAP) system. The Engine Control Module (ECM) monitors for leaks and actuator malfunctions based on the EVAP pressure. The leak detection pump creates negative pressure through the reference orifice. When the system is normal, the EVAP pressure is between 97 to 100 kPa(abs) [726 to 750 mmHg(abs) (Typical value)] and saturated within a minute. If not, the ECM interprets this as a malfunction. The ECM illuminates the MIL and stores a Diagnostic Trouble Code (DTC) if this malfunction is detected in consecutive drive cycles. The Canister Pump Module is attached to the EVAP Canister and contains the Canister Pressure Sensor, the Leak Detection Pump, and the Vent Valve.

OBDII Code P043E Scion - Evaporative Emission System Leak Detection Reference Orifice Low Flow - AutoCodes.com — P043E Scion Code - Evaporative Emission System Leak Detection Reference Orifice Low Flow

What does this mean?

What are the Possible Causes of the DTC P043E Scion?

Faulty Canister Pump Module
Canister Pump Module harness is open or shorted
Canister Pump Module circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P043E Scion?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P043E Scion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P043E Scion Code

1. What are the common symptoms of OBDII code P043E in a Scion related to the Evaporative Emission System?

- Common symptoms include the illumination of the check engine light, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What are some possible causes of OBDII code P043E in a Scion?

- Possible causes include a loose or damaged gas cap, leaks in the evaporative emission system, faulty purge control valve, or issues with the fuel tank pressure sensor.

3. How serious is OBDII code P043E in a Scion?

- While this code may not cause immediate drivability issues, it is important to address it promptly to prevent potential damage to the emission control system and ensure optimal vehicle performance.

4. Can I continue driving my Scion with OBDII code P043E?

- It is generally safe to drive the vehicle for a short period with this code, but it is recommended to have the issue diagnosed and repaired as soon as possible to avoid more severe problems.

5. What is the typical repair process for OBDII code P043E in a Scion?

- The repair process involves diagnosing the specific cause of the code, which may include inspecting the gas cap, checking for leaks in the system, testing the purge control valve, and examining the fuel tank pressure sensor.

6. How can I prevent OBDII code P043E from recurring in my Scion?

- To prevent the code from recurring, make sure to tighten the gas cap properly after refueling, perform regular maintenance on the evaporative emission system, and address any issues promptly as they arise.

7. Can I clear the OBDII code P043E in my Scion with a diagnostic tool?

- Yes, you can clear the code using an OBDII diagnostic tool, but it is important to address the underlying issue causing the code before clearing it to prevent it from coming back.

8. Is it possible to troubleshoot and repair OBDII code P043E in a Scion at home?

- While some basic troubleshooting like checking the gas cap can be done at home, diagnosing and repairing the root cause of the code may require professional expertise and specialized equipment.

9. What role does the Evaporative Emission System Leak Detection Reference Orifice play in triggering OBDII code P043E in a Scion?

- The reference orifice is a key component in the evaporative emission system and a low flow through it can trigger the P043E code, indicating a potential leak detection issue that needs to be addressed.

10. How long does it typically take to repair OBDII code P043E in a Scion?

- The repair time can vary depending on the specific cause of the code and the extent of the issue. It is recommended to consult a professional technician for an accurate estimate of the repair time.